Autonomic nervous system Flashcards

1
Q

preganglionic

A

-all preganglionic receptors are nicotinic/Ach

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2
Q

postganglionic: parasympathetic

A
  • 1) nicotinic=somatic NS
    2) muscarinic =smooth msucle, cardiac, muscle, exocrine glands
  • Ach for both types (cholinergic postganglionic fibers)
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3
Q

postganglionic: sympathetic

A
  • alpha and beta receptors
  • NE
  • adrenergic fibers
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4
Q

parasympathetic preganglionic

A
  • craniosacral

- synapse near site of smooth muscle, cardiac muscle, exocrine glands–long

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5
Q

parasympathetic postganglionic

A

-are short, b/c come from ganglia close to organs being innervated

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6
Q

sympathetic preganglionic

A

thoracolumbar

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7
Q

sympathetic postganglionic

A
  • long

- b-1/b2/a-1 are adrenergic receptors

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8
Q

-a-2:

A
  • presynaptic and inhibitory
  • when bound to NE, inhibit Adenylate cyclase, and inhibit cAMP formation, dec Ca entry to neuron terminal, decreasing release of NE into synaptic cleft
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9
Q

NE action termination

A
  • reuptake into postganglionic nerve

- MAO is in cytoplasm to deactivate it

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10
Q

Ach action termination

A

acetylcholinesterase hydrolizes it

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11
Q

somatic NS

A

-cholinergic efferent fibers from central cell bodies exit spinal cord and synapse to nicotinic receptors on skeletal muscle

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12
Q

adrenal

A

-Acetylcholine cause release of epinephine

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